Hybrid Character Sums From Vectorial Dual-Bent Functions and Asymptotically Optimal Complex Codebooks With Small Alphabet Sizes

Hybrid character sums are an important class of exponential sums which have nice applications in coding theory and sequence design. Let F_p^m be the finite field with p^m elements for a prime <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http:/